Improvement in moulding fife



@anni l GEORGE H. GARRE'IT, OF SI12-LOUIS, MISSOURI, ASSIGNOR 'IO l 'RICHARD PoGARRET'I, OF SAME PLACE.

Lette/rs Patent No. 85,440, dated December 29, 1868.

IMPRQVEMENT IIN MOULDING PIPE.

To all whom ttmay'eoncewt:

:e it known that I, GEORGE H. GARRETT, of St.

Louis, in the county of'St. Louis, and State of Missouri, have made certain new and useful Improvements in Apparatus for MonldingPipes and other cylindrical lcastings; and I dohereby declare that the following is. a full and clear description thereof, referen'cc beinghad to the accompanying drawings, and to the letters of reference marked thereon. yThe object of this inventionis to constructan irnproved apparatus for moulding pipes or other round or cylindrical castings, the moulds to be rammed on their sides, as hereinafter more fully described.

The invention consists of an improved flask, into which the sand is to be. rammed, and a revolving mould or pressing-device, which presses and forms the sand into the'reqnired shape for the article to be cast. v

To enable those skilled in the art to make and use my improved apparatus, I will proceed to describe its construction and operation.

Figure 1 of the drawings isa side elevation of the improved apparatus, including both the flask and the ramming-device.

Figin'e 2 is a top plan of the same.

Figure 3 is a plan of the flask alone.

Figure 4 is a transverse sectional elevation of the flask and ramming-device.

Figure 5 is a sectional elevation ofthe ask alone.

The flask A is to be made of metal, and is tobeaccurately constructed, so as to form just one-half, or one even fractional portion of a whole iiask, and to this end the-straight or joining side of the flask will be planed olf perfectly straight and true, so as to fit accurately against the correspondn g joint or joints of the remaining piece or pieces of the whole ask.

-These hash-sections are to be made the exact counterparts of each other, so that any two of the same series of flasks may be put together and accurately fit.

each other, so as to form a perfect flask.

Each vhash-section, then, must be a segment of a circle, so that when the whole iiask is pnt together, it will form a perfect cylinder.

The end-parts of the ilask-pieces are to be accurately tiuned out, so as to form seats at a for the bearings of the cores.

The sides of each of the iiask-pieces A are provided with holes, as at a, for the insertion of trunnion-pins, by means of which to lift the flask. v

These holes should be so located as to cause the Hash-section to be counterpoisedon the vtruunionsinserted therein, when the said flask-section is filled with sand and elevated by means of the said trunnious.

There are also other trunnion-holes, as at a'which i are formed partly in each of the flask-sections, as shown in ii f. 1.

Wll'shen the Haak-sections are bolted together, as hereinafter more fully described, the whole flask may be lifted by its trunnions at a2, on 'which the whole flask will balance, suitable machinery, ofcourse, being used for the purpose of raising the said flask.

rlhe holes at a and a2 are accurately bored out, so that the same trunnion-pin may be fitted into either place.

A rib, a3, as shown best in fig. 5, extends along each the said iask-section.

The moulding-apparatus consists of a roller, B, and a sweep, O, with various devices for operating the same, all of which are secured to and operated from the frame D, which is neatly and accurately tted to the ask-section A, and secured thereto by means ofthe set-screws d.

The holes for the screws l must be bored into the flame D and the iiask A, from marks made from the same templet, so as to make any two sections ofthe flask to t together at random, and in the same manner the frame D and its appendages maybe applied to any flask-section with equal exactness:

In the end-pieces of the frame D, bearings are probearings to be concentric with the flask-section.

One end of the shaft E overhangs the end of the frame D and flask A, and is provided with a handwheel, E', by means of which to turn it.

The roller B has its bearings in the radial arms B', which project from one side of the central shaft E, and the sweep G is secured to the opposite side of the said central shaft by means of similar radial arms, C'.

The periphery of the roller B is to .be turned in'whatever shape or form it is desired to give the completed pipe or casting.

attached to the shaft E, are made adjustable, as to screws, b', or cams might be used in lieu of the said screws.

The said boxes b are secured to the ends of the arms B by means of the said set-screws, or theirvequivalent devices, and by them they may be moved in or out, so as to increase or diminish the distance between the centres of the roller B and the shaft E, for the purpose hereinafter more fully explained.

The sweep O is attached to the central shaft E by means of arms, C', these arms having their inner ends formed in the shape of a band, which is made to surround the shaft, which is rounded at that part, s0 as to permit the said arms to be turned around on the shaft, for the purpose of changing the position of the sweep,

shaft.

The arms C may be securely xed to the shaft E at any point by means of the set-screws c.

In constructing the ask, an opening may be made side ofthe flask-section, parallel with and close to its straight face, for the purpose of holding the sand in vided for the journals of a central shaft, E,the saidL The arms B', by means of which the rolleris to be v length, by means of movable bearing-boxes, b, and seto r of turning the sweep around without turning the' along one entire side of one of its sectionsv for a gate, or openings may be made, at c, in one of its ends, for this purpose. Thesevopenings, of course-,would have to be covered with some moulders facing-material t0,

prevent the molten metal from cutting therein into the metal flask. A thin rim of sand would have tol he interposed between the body of the casting and the coreprint, to keep the molten metal from the flask at that point.

The apparatus, constructed as above described, is to be operated as follows:

One of the flask-sections is to be filled around its outer part with tempered sand, and pressed. into nearly theshape of the mould, with the moulders hands, or by other suitable means. Then the frame D and its appendages are to be placed on the flask, and secured thereto by means ofthe set-screws zZ.

At this time the roller B may or may not be in its place in the machine. lf it should he out, the screws c may he loosened, and the sweep C moved around the shaft E by hand, thereby scraping ofi' the sand from the high places, and filling up the cavities.

When the sand is properly shaped in lthis manner,

the roller B will be brought into requisition, and at first it will be drawn up as close to the shaft E asjits adjustable arms will allow it to go. I

The sweep G will then be secured to the shaft E by means of the screws c, and the shaft E will be revolved about its axis by means of the hand"\vheel E.

At each successive revolution of the shaft E, the roller will be set further out, by means ofthe setscrews b', until its outer limit (which must be defined by afxed or adjustable stop)` shall have been reached.

As the roller is pressed over the sand of the mould 'in this manner', the sand will he. properly formed and hard pressed by the said roller, for the purposes of' cast ing therein.

As`new sand is added the sweep C willshape and form it oif in the proper manner, so that the roller may act upon it with a uniforn pressure, and all parts of' the mould will thereby be pressed to an equal 11egrec of hardness. v

By having the centres of' the shaft E accurately fixed 'in the frame D, and the frame D secured to the flasksections inthe accurate manner hereinbcf'ore described,

fit-is evident that the moulding of' each flask-section in this manner will be a perfect segment of a circle.

Should a greater length of casting be desired than can be readily moulded by one length of roller B, the fiask may be made longenough for the desired purpose, and then, after one end shall havbeen moulded, the apparatus may he morcd to the other end of the flask.

Should the mould be a very large one, the wheel `E may be required to he a cog-wheel, and acted upon by a small pinion', in order'to secure power enough to turn tht` roller B around in the mould.

Having described my invention,

That I claim,

1. The fiaslA, when provided with an adjustable frame-work, l), and a pressing-roller, B, for moulding and shal'iing the sand, in the manner herein shown and described.

. 2. The roller B, and its adjustable arms B, when varranged and operated as described and set forth.

GEO. H. GARRETT.

`Witnesses:

M. RANDOLPH, ROBERT BURNS. 

